JP2000327000A - Container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container made of a synthetic resin sheet wherein a lid opened state or a lid closed state of the container can be surely and easily maintained, and by which a packaging work or an unpacking work of an article can be facilitated. SOLUTION: For this container 2, a first sheet molded body 4 section which constitutes a lid body 42, a second sheet molded body 6 section which constitutes a container main body 62, and a hinge section 10 which turnably connects the first sheet molded body section and the second sheet molded body section, are integrally molded, and on the hinge section 10, a perforation-form slit 102 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container used for storing various items such as foods, miscellaneous goods, stationery and flowers, and more particularly to a container which can be freely opened and closed. And a container made of a synthetic resin sheet.

[0002]

2. Description of the Related Art In order to distribute or display goods such as various foods, the goods are stored in a container with a synthetic resin lid. Such a lidded container is formed by, for example, vacuum forming or pressure forming a synthetic resin sheet such as polypropylene or polyethylene using a mold.

[0003] This type of container is composed of a container body and a lid integrally connected via a hinge portion. After storing food in a storage portion formed in the container body, the container is bent at the hinge portion. The lid was closed in this way.

[0004]

However, since the hinge portion is also made of resin, even if it is bent at the hinge portion and the lid is closed, the lid opens due to the elasticity of the resin. Try to return to For this reason, after the pair of flange portions provided on the container body and the lid body are brought into contact with each other, they are fixed by using an adhesive tape, a stapler, or the like when heat-sealing them, or opened with a rubber band. In order to prevent such a situation, it was necessary to perform an operation for maintaining the cover in a closed state with a hand or a jig.

[0005] Further, when removing the articles stored in the container body, the fixing of the flange portion is released and the lid is opened by opening the lid, but the lid that is fully opened is hinged. Due to the elasticity of the resin constituting the part, the part is to be returned to the closing direction again, so that it is in a half-open state. For this reason, in order to maintain the fully open state and facilitate the work of taking out an article, it is necessary to maintain the fully open state of the lid manually or with a jig.

That is, in the conventional container made of a synthetic resin sheet, it is often necessary to use a person or a jig at the time of packing or unpacking the goods, and to perform some operation for maintaining the open state or the closed state using a person or a jig. The packaging or unpacking operation of the product was complicated.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art, to easily maintain the open state or the closed state of the container, and to facilitate the work of packing or unpacking goods. An object of the present invention is to provide a container made of a synthetic resin sheet that can be achieved.

[0008]

In order to achieve the above object, a container according to a first aspect of the present invention comprises a first sheet molded part forming a lid and a second sheet forming a container body. A container in which a molded body portion and a hinge portion rotatably connecting the first sheet molded body portion and the second sheet molded body portion are integrally formed, and a through hole is formed in the hinge portion. It is characterized by having been done.

Preferably, the through hole is a slit formed in a perforated shape in the longitudinal direction along the hinge portion. The through-hole does not necessarily need to be a perforated slit, and may be a dot-like hole formed intermittently.

[0010] A container according to a second aspect of the present invention comprises a first sheet molded part forming a lid, a second sheet molded part forming a container body, and a first sheet molded part and a second sheet molded part forming a container body. A container integrally formed with a hinge part for rotatably connecting the two-sheet molded body part, wherein the first sheet molded body and the second sheet molded body have the hinge part as a center of rotation; A pair of flange portions facing each other when the first sheet molded body portion is rotated with respect to the second sheet molded body portion is formed, and at least one of the flange portions, preferably both, is provided with the flange portion. A fragile portion for cutting out at least a part thereof is formed.

Preferably, the fragile portion is a slit formed intermittently in a perforation. However, the fragile portion does not necessarily need to be a perforated slit,
It may be a dotted through hole formed intermittently or a continuous or disconnected groove.

It is preferable that the first sheet molded body and the second sheet molded body have an engaging portion which engages with each other when the lid is closed to prevent the lid from being opened. This is for maintaining the closed state.

The sheet used in the present invention can be made of a synthetic resin.

The sheet may be formed from a single layer or a composite layer of a synthetic resin sheet and a foamed resin or another resin or rubber.

The thickness of the synthetic resin sheet is not particularly limited, but is preferably 0.1 to 2 mm. If the thickness of the sheet is less than 0.1 mm, the rigidity tends to be insufficient, and if it exceeds 2 mm, the shapeability at the time of molding tends to be inferior.
0.8 mm is more preferred.

[0016] The synthetic resin sheet used in the present invention is not particularly limited.
Propylene-ethylene copolymer (ethylene content is 1 ~
50% by weight), high-density polyethylene, vinyl chloride resin, acrylonitrile-butadiene-styrene copolymer, polystyrene, and various synthetic resins such as A-PET (amorphous polyethylene terephthalate). In addition, such a synthetic resin sheet may contain additives such as an inorganic filler, an antistatic agent, an ultraviolet absorber, and a pigment. The content of these additives is 0.1 to 100 parts by weight in total, and
It is preferably 30 parts by weight, more preferably 0.1 part by weight.
It is 2 to 20 parts by weight.

The container of the present invention is formed by, for example, vacuum forming or vacuum pressure forming a synthetic resin sheet.

The through hole formed in the hinge portion and the fragile portion formed in the flange portion may be integrally formed when the container is formed by a vacuum forming method or the like. After molding, it may be engraved using a punching blade or the like.

[0019]

In the container according to the first aspect of the present invention, since the through hole is formed in the hinge portion, the hinge portion is formed when the lid is rotated around the hinge portion as the rotation center. The elasticity of the resin itself is relaxed, and a force for returning to the opening direction of the lid when the lid is closed is less likely to act. Further, since the through hole is formed in the hinge portion, even when the lid is opened and fully opened, the elasticity of the resin constituting the hinge portion is reduced as in the case of the closed state, and the lid is The force that returns in the closing direction is less effective.

Therefore, compared to a conventional container having a hinge portion without forming a through hole, the lid can be more reliably maintained in the closed state or the open state. Therefore, it is not necessary to maintain the open state or the shielded state with a person or a jig when packing or unpacking the goods in the container according to the present invention, and the packing or unpacking work of the goods becomes easy.

In the container according to the second aspect of the present invention, the first sheet molded part constituting the lid and the second sheet molded part constituting the container main body are provided with the hinge around the hinge as the center of rotation. A pair of flange portions facing each other when the container is rotated to the container body is formed, and a weak portion for notching at least a part thereof is formed in the flange portions. When the cover is to be in the closed state, the flange portion surrounded by the fragile portion is fixed by welding or an adhesive, and when the cover is to be opened again, the flange portion in which the fragile portion is formed is set to one. It bends several times, and cuts out the flange along the fragile part.

Therefore, the opening operation is easier as compared with a conventional container in which the flange portion is entirely or partially fixed without providing a fragile portion.

The container of the present invention having the above-described functions can be used for storing, transporting, storing or displaying various articles such as foods, sundries, stationery and flowers.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the drawings. FIG. 1 is a plan view showing a container made of a synthetic resin sheet immediately after molding according to the first embodiment of the present invention, FIG. 2A is a sectional view taken along the line IIA-IIA shown in FIG.
FIG. 2B is a cross-sectional view showing a state before the lid is closed, and the lid is put on the container body by elastically bending the hinge portion of the container of FIG. 2A, and FIG. 2C is a state after the lid is closed. FIG. 3A is a cross-sectional view taken along the line IIIA-IIIA shown in FIG. 1, and FIG. 3B is a view showing the container of FIG. FIG. 4 is a cross-sectional view showing a closed state. FIG. 4 is a plan view showing a container immediately after molding according to a second embodiment of the present invention.
After welding the pair of handles of the container of FIG.
It is sectional drawing which shows the state which separated one handle part.

First Embodiment First, the structure of the container 2 of the present embodiment will be described. As shown in FIGS. 1 and 2, the container 2 is a container for accommodating an article such as a food, for example, and includes a lid 42 including the first sheet molded part 4 and a second sheet molded part. 6
, Which are integrally formed by vacuum forming or vacuum pressure forming a single synthetic resin sheet.

As shown in FIG. 1, the container main body 62 is formed in a substantially square shape when viewed in a plan view. As shown in FIG. 2, a peripheral wall portion 623 stands up from the flange portion 622, and the peripheral wall portion 623 rises. The upper horizontal surface portion 624 is connected to the upper end of. The storage part 625 is formed in the upper horizontal surface part 624. On the outer surface of the peripheral wall portion 623, as shown in FIG. 3, an engagement concave portion 626 which is depressed inward (toward the storage portion 625) may be formed. The position at which the engagement recess 626 is formed depends on the peripheral wall 62.
The outer surface of the container 3 is not particularly limited, but is preferably the outer surface on the front side of the container 2 (the left side in FIG. 3).

As shown in FIGS. 1 and 2, the lid 42 has a substantially square shape when viewed in a plan view, and has a size capable of closing the storage portion 625 of the container body 62 from above when the lid is closed. It is configured in. When the lid 42 is closed, the flange 42 faces the flange 622 of the container body 62.
2, a peripheral wall portion 423 stands upright, and a top plate portion 424 is connected to an upper end of the peripheral wall portion 423. Surrounding wall 4
As shown in FIG. 3, when the lid 42 is closed on the container main body 62, the engagement recess 626 of the container main body 62
An engagement projection 426 that can engage with the projection may be formed.

As shown in FIG. 1 and FIG.
A hinge 10 is integrally formed between the cover 2 and the lid 42, and the hinge 42 allows the lid 42 to rotate freely. The hinge portion 10 is formed with intermittent perforated slits 102 (through holes) along the X direction. By providing the slit 102 in the hinge portion 10, when the cover body 42 is rotated around the hinge portion 10 as a center of rotation and closed on the container body, the elasticity of the resin is reduced to facilitate the rotation. And the lid 42 is hard to return.

The length P1 and width W of the slit 102 or the interval P2 between the adjacent slits 102, 102 are determined by the material and thickness of the synthetic resin sheets constituting the first and second sheet moldings, And the length of the hinge portion 10 in the X direction can be appropriately selected. For example, when the bending durability is repeatedly improved so that the lid can be opened and closed many times, the length P1 of each slit 102 is shortened or the interval P2 between the adjacent slits 102 is increased as much as possible. Or reduce the width. On the other hand, when the bending durability is not so required, the length P1 of each slit 102 may be increased or the length of the adjacent slits 102, 102 may be increased.
What is necessary is just to shorten the space | interval P2 between them, and to enlarge the width W. In any case, regardless of the elasticity of the resin, the slit 102 is provided so that the lid 42 can be reliably closed or opened.

The length P1 of the slits 102 is not particularly limited, and the slits 102 may all have a fixed length, or may have different lengths for each slit. Is appropriately determined in the range of 0.5 to 2 mm, more preferably 0.8 to 1.2 mm. The width W of the slit 102 is also not particularly limited, and is preferably 0.3 to 2
mm, more preferably about 0.5 to 1.5 mm.
The interval P2 between the adjacent slit portions 102, 102 is also
There is no particular limitation, and the distance may be constant or different, but is preferably about 1 to 30 mm, more preferably about 10 to 20 mm.

Such a slit 102 may be integrally formed when the container 2 of the present invention is formed from one sheet by a vacuum forming method or the like.
After the is formed, for example, the slit 102 may be cut by using a punching blade having an intermittent cut in the blade. Further, the formation of the slit 102 may be performed after molding the container 2 and simultaneously with or after the deburring operation.

Next, the operation of the container 2 will be described. Immediately after the molding of the container 2, the lid 42 is fully opened with respect to the container main body 62, as shown in FIGS. 1 and 2A. In this state, articles such as food are put into the storage section 625, and the packaging operation is started.

When the cover 42 starts rotating toward the container body 62 with the hinge 10 as the center of rotation, the cover 42
Is rotated about the longitudinal direction of the slit 102 of the hinge portion 10 around the longitudinal direction, and the flange portions 422 and 622 of the lid 42 and the container body 62 are opposed to each other. The convex portion 426 and the engaging concave portion 626 of the container main body 62 are engaged with each other to
5 is closed from above.

In this embodiment, since the slit 102 is formed along the longitudinal direction of the hinge 10, the elasticity of the resin constituting the hinge 10 is reduced, and
2 is less likely to act to return to the state immediately after molding, and a more secure lid closure can be achieved. Therefore, at the time of packaging work such as heat fusion between the flange portions 422 and 622, the operation of maintaining the closed state using a hand or a jig is not required, and automation of the work becomes easy.

Further, in this embodiment, since the engaging concave portion 626 of the container main body 62 is fitted inside the engaging convex portion 426 of the lid 42, the lid 42 will be further opened again. Can be prevented.

When taking out an article from the container 2,
In a normal container in which the slit 102 is not formed, the lid is in a half-open state even if the lid is fully opened. However, in this embodiment, since the slit 102 is formed, even if the lid 42 is fully opened, Maintain state. For this reason, the unpacking work of the article becomes extremely easy.

Second Embodiment In the container 2a according to the present embodiment, as shown in FIG. 4, handle portions 422a and 622a are provided substantially at the center of the flange portions 42 and 62 in the longitudinal direction.
A perforated slit 422b (fragile portion) is formed so that a can be cut off by an external force.
Other configurations are the same as those of the container 2 of the first embodiment.

That is, the container 2 a of the present embodiment includes the handle 4 of the flange 422 of the lid 42 in addition to the hinge 10.
A slit 422b is also formed in 22a. In the present embodiment, the slit 422b is formed at one location of the flange portion 422, but is not limited to this, and may be formed at a plurality of locations, and a handle surrounded by the inside of the slit 422b. The area of the portion 422a is not particularly limited.

After articles such as food are stored in the storage section 625 of the container 2a, the slit 102
The cover 42 is rotated along the center of rotation along
The closing operation of the lid 42 is performed. Then, a pair of grips 622
a and 422a contact each other. Thereafter, the handles 622a and 422a are fixed by heat fusion or the like.
The method of fixing the grip portions 622a and 422a is not particularly limited, and may be, for example, welding using an ultrasonic sealing device or the like, or bonding using an adhesive.

When the contents are taken out, the handles 622a and 422 having the slits 422b are formed.
As shown in FIG. 5, at least one of the grips 4a is formed by pinching the finger 22a with a finger or a jig and bending it once or several times.
22a can be cut off along the slit 422b, and the opening operation of the lid 42 can be facilitated.

The slit 422b is provided in the slit 1
Similarly to 02, the container 2a can be formed after the molding, at the same time as or after the deburring operation.

The slit 422b is provided in the flange 62 of the container body 62 together with the flange 422 of the lid 42.
2 may be formed, or may be formed only on the flange portion 622 of the container body 62. The container 2a
Then, the slit 102 of the hinge part 10 is not always necessary.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments at all, and it is needless to say that the present invention can be implemented in various modes without departing from the gist of the present invention. It is.

[0044]

As described above, according to the present invention, it is easy to reliably maintain the open state or the closed state of the container, and to facilitate the packaging or unpacking of an article. A container made of a synthetic resin sheet that can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view showing a synthetic resin sheet container immediately after molding according to a first embodiment of the present invention.

2 (A) is a cross-sectional view taken along the line IIA-IIA shown in FIG. 1, and FIG. 2 (B) shows the container of FIG. FIG. 2C is a cross-sectional view illustrating a state before the cover is closed and before the lid is closed, and FIG. 2C is a cross-sectional view illustrating a state after the lid is closed.

3 (A) is a cross-sectional view taken along the line IIIA-IIIA shown in FIG. 1, and FIG. 3 (B) shows the container of FIG. It is sectional drawing which shows the state which covered and closed.

FIG. 4 is a plan view showing a container immediately after molding according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a state in which a pair of handles of the container of FIG. 4 are brought into contact with each other and welded, and then one of the handles is cut off.

[Explanation of symbols]

 2, 2a Container 4 First sheet molded part 42 Lid 422 Flange 422a Handle 422b Slit 423 Peripheral wall 424 Top plate 426 Engagement projection 6 Second sheet molded Part 62: Container body 622 ... Flange part 622a ... Handle part 623 ... Peripheral wall part 624 ... Upper horizontal plane part 625 ... Storage part 626 ... Engagement concave part 10 ... Hinge part 102 ... Slit

Continued on front page F term (reference) 3E067 BA05A BB09A BB14A BB15A BB16A BB22A BC06A CA13 CA21 EA22 EB11 EB17 FA01 FC01 3E084 AA05 AA14 AA24 BA01 CA03 CC03 DA03 DB09 DB14 DC03 FA02 GA06 GB06 GB17 GB21 KA

Claims (3)

[Claims] 1. A first sheet molded part constituting a lid, a second sheet molded part constituting a container body, and the first sheet molded part and the second sheet molded part are rotatable. A container integrally formed with a hinge portion connected to the container, wherein a through hole is formed in the hinge portion. 2. A first sheet molded part constituting a lid, a second sheet molded part constituting a container body, and the first sheet molded part and the second sheet molded part are rotatable. A container integrally formed with a hinge part connected to the first sheet molded body and the second sheet molded body. A pair of flange portions facing each other when rotated with respect to the sheet molded body portion are formed, and at least one of the flange portions is formed with a fragile portion for notching at least a part of the flange portion. A container characterized in that: 3. The first sheet molded body and the second sheet molded body each have an engaging portion which is engaged with each other when the lid is closed to prevent the lid from being opened. container.